On Sun, Jan 04, 2004 at 07:38:16PM +0000, WipeOut wrote:Granted five 9's is never easy but in a cluster of 10+ servers the system should survive just about anything short of an act of God..
Also a failover system would typically only be 2 servers, if there were a cluster system there could be 10 servers in which case five 9's should be easy..
Err, no. five 9s is *never* easy.
Does your telco provide you with SLAs that make five 9s reasonable at all ?
Do you really need five 9s ? There is no such thing I'm aware of in enterprise grade telephony. You have to go to "carrier grade" equipment, which asterisk, and PCs in general, are definetly not aimed at.
Maybe, as mentioned eariler, a more realistic goal for Asterisk is three or four 9's.. Three 9's could probably be achived already on a single server with RAID and hot swap power so four 9's is probably a good target to go for..
Later..
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